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IGBT drive circuit of multi-fault monitoring unit

A technology for driving circuits and monitoring units, applied in circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, emergency protection circuit devices, etc., can solve problems such as lock-up, and improve safety and stability. Effect

Active Publication Date: 2021-03-26
广东澳鸿科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because of the PNPN structure inside, there is a probability that it will be locked. In order to protect the IGBT and the drive circuit, it is urgent to propose an IGBT drive circuit with multiple safety monitoring modules.

Method used

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  • IGBT drive circuit of multi-fault monitoring unit
  • IGBT drive circuit of multi-fault monitoring unit
  • IGBT drive circuit of multi-fault monitoring unit

Examples

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] This embodiment discloses an IGBT drive circuit of a multi-fault monitoring unit, which includes an IGBT tube Q24, the gate of the IGBT tube Q24 is connected to the drive circuit, and the emitter is connected to the IGBT overcurrent protection circuit, and the drive circuit includes a high voltage protection circuit. And high side drive current limiting circuit, high side drive overcurrent protection and open circuit protection circuit, low side drive current limiting circuit and undervoltage protection circuit. The connection relationship of each circuit is as follows:

[0019] Such as figure 1 As shown, the high-voltage protection and high-side drive current limiting circuit includes comparator COMP1, comparator COMP2, MOS transistor Q4, MOS transistor Q5, MOS transistor Q6, MOS transistor Q7, MOS transistor Q8, MOS transistor Q9, M...

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PUM

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Abstract

The invention discloses an IGBT drive circuit of a multi-fault monitoring unit. The IGBT drive circuit comprises an IGBT tube Q24, wherein a gate of the IGBT tube Q24 is connected with a drive circuit, an emitter of the IGBT tube Q24 is grounded through a divider resistor R1 and is connected with a non-inverting input end of a comparator COMP4, an inverting input end of the comparator COMP4 inputsa reference voltage, an output end of the comparator COMP4 outputs a signal to a control circuit, and the drive circuit comprises a high-voltage protection and high-side drive current-limiting circuit, a high-side drive overcurrent protection and open-circuit protection circuit, a low-side drive current-limiting circuit and an undervoltage protection circuit. The IGBT drive circuit has the functions of high-voltage protection, under-voltage protection, over-current protection, open-circuit protection, high-low side current limiting, over-current protection of an external IGBT and the like, and the safety and stability of the whole circuit can be greatly improved.

Description

technical field [0001] The invention relates to an IGBT driving circuit of a multi-fault monitoring unit, belonging to the technical field of electronic circuits. Background technique [0002] Insulated Gate Bipolar Transistor (IGBT) is a general-purpose power semiconductor device with high input impedance and strong current carrying capacity. However, due to the internal PNPN structure, there is a possibility of locking up. In order to protect the IGBT and the driving circuit, it is urgent to propose an IGBT driving circuit with multiple safety monitoring modules. Contents of the invention [0003] The purpose of the present invention is to provide an IGBT driving circuit of a multi-fault monitoring unit, which has functions such as high voltage protection, undervoltage protection, overcurrent protection, open circuit protection, high and low side current limiting, and external IGBT overcurrent protection. [0004] The technical solution adopted by the present invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/20H02H3/20H02H9/02
CPCH02H7/205H02H3/207H02H9/025
Inventor 方锦海郑鲲鲲
Owner 广东澳鸿科技有限公司
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